Backyard Ballistics

Backyard Ballistics

Growing up, we certainly had our share of fun — and got into a fair share of trouble — with our potato guns. Now we can rebuild better, stronger guns with the help of Backyard Ballistics ($11). Plans for building potato guns, a match-powered rocket, a tennis ball mortar, a pneumatic missile, and more are included. Just make sure not to bust out your neighbor's windows with your "toys."

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